<script setup name="IconPicker">
import { icons } from "@/iconify";

const props = defineProps({
  modelValue: {
    type: String,
    default: ""
  }
});

const myValue = ref("");
watch(
  () => props.modelValue,
  (value) => {
    myValue.value = value;
  },
  {
    immediate: true
  }
);

const dialogVisible = ref(false);
const activeName = ref(myValue.value.split(":")[0] || icons[0].prefix);
const search = ref("");
const pagination = ref({
  page: 1,
  pageSize: 40
});

const iconList = computed(() => {
  let iconsFilter = icons.filter((item) => {
    return item.prefix === activeName.value;
  })[0].icons;
  if (search.value) {
    iconsFilter = iconsFilter.filter((item) => {
      return item.includes(search.value);
    });
  }
  return iconsFilter;
});
const currentIconList = computed(() => {
  return iconList.value.slice(
    (pagination.value.page - 1) * pagination.value.pageSize,
    (pagination.value.page - 1) * pagination.value.pageSize +
      pagination.value.pageSize
  );
});

function handleTabChange() {
  pagination.value.page = 1;
}

const previewIcon = ref("");
const previewIconIndex = ref(0);
const previewIconPosition = computed(() => {
  return [
    previewIconIndex.value < 18 ? "top" : "bottom",
    previewIconIndex.value % 6 >= 3 ? "left" : "right"
  ].join("-");
});
function showPreviewIcon(iconName, index) {
  previewIcon.value = iconName;
  previewIconIndex.value = index;
}
function hidePreviewIcon() {
  previewIcon.value = "";
  previewIconIndex.value = 0;
}

const emit = defineEmits(["update:modelValue"]);
function chooseIcon(val) {
  myValue.value = val;
  emit("update:modelValue", val);
  dialogVisible.value = false;
}
function removeIcon() {
  myValue.value = "";
  emit("update:modelValue", "");
  dialogVisible.value = false;
}
</script>

<template>
  <el-icon
    class="icon-picker"
    :class="{ empty: myValue === '' }"
    @click="dialogVisible = true"
  >
    <svg-icon :name="myValue !== '' ? myValue : 'i-ep:plus'" />
  </el-icon>
  <el-dialog
    v-model="dialogVisible"
    width="600px"
    :show-close="true"
    append-to-body
  >
    <div class="icon-picker-dialog-body">
      <el-tabs
        v-model="activeName"
        tab-position="left"
        class="demo-tabs"
        @tab-change="handleTabChange"
      >
        <el-tab-pane
          v-for="item in icons"
          :key="item.prefix"
          :name="item.prefix"
        >
          <template #label>
            <div class="icon-label">
              <div class="name">{{ item.info.name }}</div>
              <div class="total">{{ item.info.total }} 个</div>
            </div>
          </template>
        </el-tab-pane>
      </el-tabs>
      <div class="main-container">
        <div class="search-bar">
          <el-input
            v-model="search"
            size="large"
            placeholder="搜索..."
            clearable
          >
            <template #prefix>
              <el-icon>
                <svg-icon name="i-ep:search" />
              </el-icon>
            </template>
          </el-input>
        </div>
        <div class="list-icon">
          <el-icon class="list-icon-item empty" @click="removeIcon">
            <svg-icon name="i-ep:delete" />
          </el-icon>
          <el-icon
            v-for="(icon, index) in currentIconList"
            :key="index"
            class="list-icon-item"
            @click="chooseIcon(`${activeName}:${icon}`)"
            @mouseover="showPreviewIcon(`${activeName}:${icon}`, index + 1)"
            @mouseout="hidePreviewIcon"
          >
            <svg-icon :name="`${activeName}:${icon}`" />
          </el-icon>
          <el-icon
            class="list-icon-preview-item"
            :class="previewIcon && previewIconPosition"
          >
            <svg-icon :name="previewIcon" />
          </el-icon>
        </div>
        <el-pagination
          v-model:current-page="pagination.page"
          layout="prev, pager, next"
          :page-size="pagination.pageSize"
          :total="iconList.length"
          :pager-count="5"
          background
        />
      </div>
    </div>
  </el-dialog>
</template>

<style lang="scss" scoped>
.icon-picker {
  width: 40px;
  height: 40px;
  line-height: 36px;
  text-align: center;
  color: var(--el-text-color-regular);
  border: 1px solid var(--el-border-color);
  border-radius: 5px;
  cursor: pointer;
  transition: 0.3s;
  font-size: 24px;
  vertical-align: middle;
  &:hover {
    border: 1px solid var(--el-border-color-darker);
  }
  &.empty {
    color: var(--el-text-color-placeholder);
    border: 1px dashed var(--el-border-color);
    &:hover {
      color: var(--el-text-color-regular);
      border: 1px solid var(--el-border-color-darker);
    }
  }
}
.icon-picker-dialog-body {
  display: flex;
  height: 650px;
  margin: calc((var(--el-dialog-padding-primary) + 10px + 30px) * -1)
    calc(var(--el-dialog-padding-primary) * -1)
    calc((var(--el-dialog-padding-primary) + 10px) * -1)
    calc(var(--el-dialog-padding-primary) * -1);
  .el-tabs {
    :deep(.el-tabs__nav-prev),
    :deep(.el-tabs__nav-next) {
      background-image: linear-gradient(
        to right,
        transparent,
        var(--el-fill-color)
      );
    }
    :deep(.el-tabs__header .el-tabs__nav) {
      .el-tabs__active-bar {
        z-index: 0;
        width: 100%;
        background-color: unset;
        background-image: linear-gradient(
          to right,
          transparent,
          var(--el-fill-color)
        );
        border-right: 2px solid var(--el-color-primary);
        transition: 0.3s;
      }
      .el-tabs__item {
        position: relative;
        margin-bottom: -2px;
        height: auto;
        transition: 0.3s;
        &::after {
          content: "";
          position: absolute;
          left: 0;
          bottom: 0;
          width: 100%;
          height: 2px;
          background-image: linear-gradient(
            to right,
            transparent,
            var(--el-fill-color)
          );
        }
        .icon-label {
          display: flex;
          flex-direction: column;
          width: 120px;
          text-align: left;
          line-height: 20px;
          padding: 15px 0;
          .name {
            font-size: 16px;
            margin-bottom: 2px;
            white-space: normal;
            word-break: initial;
          }
          .total {
            font-size: 12px;
          }
        }
      }
    }
  }
  .main-container {
    flex: 1;
    margin-right: 11px;
    .search-bar {
      margin: 0 75px;
      .el-input {
        margin-top: 20px;
      }
    }
    .list-icon {
      position: relative;
      margin: 15px 0;
      min-height: 160px;
      .list-icon-item {
        margin: 5px;
        box-sizing: content-box;
        padding: 15px;
        font-size: 28px;
        cursor: pointer;
        border: 1px solid var(--el-border-color);
        transition: var(--el-transition-border);
        &:nth-child(6n + 6) {
          margin-right: 0;
        }
        &:not(.empty):hover {
          border-color: var(--el-border-color-darker);
          background-color: var(--el-fill-color);
          color: var(--el-color-primary);
          transition: background-color 0.3s, var(--el-transition-border),
            var(--el-transition-color);
        }
        &.empty {
          border-color: transparent;
          color: var(--el-text-color-placeholder);
          transition: var(--el-transition-color);
          &:hover {
            color: var(--el-text-color-disabled);
          }
        }
      }
      .list-icon-preview-item {
        display: none;
        position: absolute;
        box-sizing: content-box;
        padding: 10px;
        border: 1px solid var(--el-border-color-darker);
        font-size: 108px;
        background: var(--el-fill-color);
        color: var(--el-color-primary);
        &.top-left {
          display: block;
          top: 5px;
          left: 5px;
        }
        &.top-right {
          display: block;
          top: 5px;
          right: 5px;
        }
        &.bottom-left {
          display: block;
          bottom: 5px;
          left: 5px;
        }
        &.bottom-right {
          display: block;
          bottom: 5px;
          right: 5px;
        }
      }
    }
    .el-pagination {
      display: flex;
      justify-content: center;
    }
  }
}
</style>
